.logo_w{
    display: block;
    width: 100%;
    position: relative;
    left: 0;
    top: 0;
   .Group{
       width: 100%;
//     margin-left: -50px;
       
   }
   .banner_biao{
       text-align: center;
       h3{
           color: #000;
           font-size: 22px;
           padding: 25px 0;
       }
       h4{
           font-size: 20px;
           color: #ccc;
           line-height: 30px;
           padding-bottom: 15px;    
       }
   }
   .logo{
       position: absolute;
       top: 55%;
       left: 43%;
       img{
           width: 55px;
            height: 55px;
       }
       
   }
}



